Yes, manuals on the radios do exist ... but schematics aren't supplied on the Channel Elements.
The Motorola philosophy is if you need one, you buy it from Motorola. Diagrams are not included. I don't know about other manufacturers other than International Crystal as the company knows the internal workings of the Motorola Channel Elements and can supply for your requirements. Being in your country, I don't know the process there. If you have a (the) Channel Element(s), you might try handing it (them) to your local crystal supplier and see what happens? Hope this helps. Neil - WA6KLA "K. Venkataramanan" wrote: > > Hi Mike > > Thanks. Our frequencies are not same as US. We are confined to > 434-438. So I cannot expect availability of crystals / channel > elements in this range. Of course they may be useless in the US. The > local manufacturer of crystals can supply me with whatever I need > within 7 days and that too for a cost under $3 but I need to specify > the parameters - that is less than what it will cost for mere postage > from the US!!. > > I do not think any one in India has even seen a Mitrek. So it becomes > important to be able to specify. Of course I can just blindly specify > 3rd overtone crystal - series resonant and see what happens. Then I > could alter parameters after I see what it does. Even if I have to > waste a couple of crystals is no big deal compared to the hassle of > ordering and getting the xtals from US. If I get hold of the manual > including the schematics I can make a more intelligent guess looking > on the channel element circuit diagram. > > There is a ham in Bangalore who used to work for Motorola and I hope > he will be able to hunt out some information. I thought someone in > the US has a clue!! Are there service manuals around - could one > beg, borrow or steal one ? > > Thanks for your help. > > 73s Venkat VU2KV > > At 03:51 AM 19/12/2004, you wrote: > > > I may be able to help, but it will take a day or two... > > > > While I make a couple of phone calls, Venkat what > > frequencies do you need? > > > > Maybe someone on this group has them in their box of > > elements left over from their amateur radio conversions. > > > > Of maybe someone has a leftover set of UHF commercial > > elements with good crystals that are near his frequency and > > can send them to Venkat. > > His supplier could take those crystals, plug them into a test > > circuit and determine the parameters by what loading is > > needed to pull the test crystals onto the indicated frequency. > > > > Mike WA6ILQ > > > > > > At 02:05 PM 12/18/04, you wrote: > > > > >I glanced at the call and thought it was a Canadian one. Ooops. > > >I forget that world wide web means just that. Too used to thinking > > >there's just North Americans on the list for some foolish reason. > > > > > >Chuck > > >WB2EDV > > > > > >----- Original Message ----- > > >From: "Paul Kelley" <[EMAIL PROTECTED]> > > >To: <[email protected]> > > >Sent: Saturday, December 18, 2004 4:58 PM > > >Subject: Re: [Repeater-Builder] Mitrek > > > > > > > Me too, but we live in the U.S.! I suspect living in India > > > > gives one a very different perspective on that. I hope > > > > someone can help Venkat with the xtal info. (Maybe someone > > > > already has... I was only partially following the topic > > > > since I don't have the requested info.) > > > > > > > > Paul N1BUG > > > > > > > > > > > > On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: > > > >> With all due respect, if the crystal manufacturer cannot > > > >> make a crystal for a Mitrek with just the channel element > > > >> part number, I'd seriously be looking for a different > > > >> supplier. > > > >> > > > >> Chuck > > > >> WB2EDV > > > >> > > > >> ----- Original Message ----- > > > >> From: "krmvsjr" <[EMAIL PROTECTED]> > > > >> To: <[email protected]> > > > >> Sent: Saturday, December 18, 2004 6:01 AM > > > >> Subject: [Repeater-Builder] Mitrek > > > >> > > > >> > Can anyone tell me details of crystal specifications > > > >> > for UHF mitrek. I am getting a T44JJA390DK and would > > > >> > like to replace the crystals for local frequencies. I > > > >> > would like to get confirmation that the crystals are > > > >> > 3rd overtone crystals - series resonant - 32pf capacity > > > >> > - (freq =10.7 / 9 for RX) I do not know the freq > > > >> > multiplication for TX crystal. There is a local > > > >> > crystal manufacturer who can supply xrystals if the > > > >> > operating parameters are specified. Can anywho has a > > > >> > the service manual make me a copy ? Venkat VU2KV > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > --------------------------------------------------------------- > Yahoo! Groups Links > > * To visit your group on the web, go to: > http://groups.yahoo.com/group/Repeater-Builder/ > > * To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
